Pseudoarthrosis in ankylosing spondylitis

Area of Science:

• Orthopedics
• Rheumatology
• Spinal Surgery

Background:

• Ankylosing spondylitis (AS) is a chronic inflammatory disease primarily affecting the spine.
• Pseudoarthrosis, a type of non-union fracture, can complicate the management of spinal deformities in AS.
• Understanding the specific pathology of spinal pseudoarthrosis in AS is crucial for effective treatment.

Purpose of the Study:

• To define the pathological characteristics of pseudoarthrosis in the spine specifically within the context of ankylosing spondylitis.
• To elucidate the imaging findings associated with spinal pseudoarthrosis in AS patients.

Main Methods:

• Review of relevant literature on spinal pseudoarthrosis and ankylosing spondylitis.
• Analysis of radiological and pathological features described in case studies and series.
• Synthesis of diagnostic criteria and pathognomonic signs.

Main Results:

• Pseudoarthrosis of the spine in AS is characterized by a fracture extending through the intervertebral disc and neural arch.
• Vertebral body end-plate destruction is a key feature.
• Adjacent bony sclerosis is consistently observed around the fracture site.

Conclusions:

• Spinal pseudoarthrosis in ankylosing spondylitis presents a distinct pathological pattern involving fracture and vertebral destruction.
• Radiological identification of vertebral end-plate destruction and bony sclerosis aids in diagnosis.
• Further research into the biomechanics and treatment of this specific complication is warranted.